It's not a Heathkit GR-53:
Link to Google Books Search for Heathkit
Circuitry looks a lot like my CTC16, with the exception of the fly, which looks to be a CTC15 fly.
...edit....it may be a CONAR from NRI, still lookin...
Cheers,
__________________
Brian
USN RET 22YRS (Avionics/Cal)
CET-Consumer Repair and Avionics ('88)
"Capacitor Cosmetologist since '79"
When fuses go to work, they quit!
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